(19)

(11)

EP 0 880 668 A1

(12)

(43) Date of publication: 02.12.1998 Bulletin 1998/49 (21) Application number: 97903689.0 (22) Date of filing: 29.01.1997

(51) International Patent Classification (IPC):  F42B 8/ 20( . ) F42B 30/ 10( . ) (86) International application number: PCT/SE1997/000139 (87) International publication number: WO 1997/030324 (21.08.1997 Gazette 1997/36)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IT LI NL (30) Priority: 14.02.1996 SE 19960000543 (71) Applicant: Roheim System 149 30 Nynäshamm (SE)	(72) Inventor: ROHEIM, Karl-Axel S-149 30 Nynäshamn (SE) (74) Representative: Billberg, Hans, et al  Axel Ehrners Patentbyra AB Box 10 316 100 55 Stockholm 100 55 Stockholm (SE)